Recent content by kansas

Nice tutorial. I feel it worth emphasizing that the best, lowest-resistance electrical connection is achieved when there is firm contact between the battery-or-circuit-board-or-whatever contact point and the wire or copper sheet BEFORE solder is applied excepting only a thin layer of nicely...

1. Review the extended thread at the top of this Forum, on lithium battery shipping rules, second thread in the Forum. 2. Ask the shipper, ie the carrier. The entity selling/sending the goods may answer differently than the carrier and has been known to distort the rules in their own interest.

I'm interested to know how you envision stacking the cells. I have had similar thoughts to yours, but built nothing, I have envisioned cells stacked like in a flashlight, in a thin-walled tube--preferably plastic, but metal like electrical conduit or copper plumbing pipe could be used with...

Well you can hear all kinds of silly things if you listen in the wrong places. How about a citation for that piece of misinformation that you heard, rather than just passing on a rumor that you heard? As the Former Guy was fond of saying while asserting misinformation, "people are saying," but...

I disagree that you cannot charge them in series, with a 36V charger. Consider this: A 12V lead-acid battery is already 6 2V cells in series. They are charged as a series unit, not as individual 2V cells. Consider that many trucks and buses have 24V systems, and the 2 12V batteries are...

Check it with a magnet.

Modern pure sine wave inverters are very efficient. There is an efficiency tax but it is modest. You may find it more suitable to use one than to invent a solution that is custom to your needs but has no other utility; you can run your TV, computer, and whatever within its power rating...

PS you may find it instructive to read all the comments below that XT-90 UTube.

Here is a UTube on your XT-90 connector. https://www.youtube.com/watch?v=4rcCdCVBXAI You can see that it will handle well in excess of 90A for short periods. The ratings of electrical components are generally for steady-state use, and can be safely exceeded for short periods. I would assume...

Resistance of #10 copper wire is very close to 1 ohm/1000 ft, or .001 ohms/foot. For a 1' length of #10 in a circuit carrying 200A, by Ohm's law E = IR, voltage drop E = 200 x .001 = 0.2V. This is what you would measure with a voltmeter connected to the two ends of the 1' section with 200A...

The voltage drop or power loss in a section of conductor can be measured, or calculated using Ohm's law. It took me many years to understand the operation of Ohm's law as well as I do now, and would take longer than I am going to spend typing to give you a tutorial; I expect there are good ones...

You and LeftieBiker are both correct, thanks. There's a good chart here https://batteryuniversity.com/learn/article/how_to_measure_state_of_charge if you scroll down a little. Note that measurement is best if the battery has been at rest (no load and no charging) for a while, they say 24...

By (imperfect) memory, it is fine to "float" flooded lead acid batteries at about 13.3V or less. That means you can leave them on indefinite trickle charge at that voltage, to maintain a fully charged state. You can probably verify this figure at the Battery University website. For...

Thanks, but the rheostat is variable up to say 10 ohms so i should be able to set the resistance to 1.2 ohms :D I will check the video. Thanks!! If you have a 10 ohm rheostat capable of dissipating (say) 100W and you set it to 1 ohm, it has only 10W capability at that setting. It will burn...

Well none of the better experts have shown up so I will dive in. Mostly, need more info. AC motors will not run on DC. At all. You say you have done it, please say exactly what you have done. What tool, what motor type, with what result. Many tools use AC/DC or "universal" motors. These...